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Optical communications, 19th century

Optical communications, 19th century

C033/0684

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Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

Optical communications. French military communicating using an optical system of lights and mirrors. The French military developed a number of such systems, including an advanced optical telegraphy system, before the widespread use of telegraphy and telephones. This illustration is from 'Physique Populaire' (Emile Desbeaux, 1891).

Release details

Model release not required. Property release not required.

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